I have seen this condition many times on 05 and 06 M/Y Mondeo. The cause is "minimum drive pulse (MDP) of the injectors".
Should a customer express concern about low idle speed (500-700 rpm) and or no throttle
response for between 2 second and 3 minutes depending on vehicle, the probable cause is the
minimum drive pulse (MDP) of the injectors, which has drifted excessively at low rail pressure
(less than 400 bar). This causes a reduction in fuel delivery versus demand and stops the engine
reaching the required idle speed in an acceptable time. The PCM does not detect the excessive
MDP drift because the strategy does not learn the MDP at the pressures where the problem
occurs.
After some time the idle speed will return to normal (800 rpm) and throttle response will be
obtained. This concern can occur when the engine is hot or cold. The issue is recurring.
To rectify this concern a new calibration has been released for service which will vary the quantity
of fuel demanded during engine cranking in order to reach the idle latch speed in an acceptable
time.
On all the cars I have seen this problem on, I have perform a calibration update to the PCM with the correct file and it has fixed the car 100%.
The problem now, is every tom dick and harry have cloned IDS units and out of date software.
If the car has been incorrectly programmed with the incorrect calibration, previously then this may be why they are saying no update available.??
here is the list of calibration that fixes the problem you are experainacing..
6S71- 12A650-HB updates to :
6S71-12K532-FB, 6S71-12K532-HB,
or
5S71- 12A650-KE update to :
5S71-12K532-RD,5S71-12K532-SE ,5S71-12K532-PD
or
5S71-12A650-LB updates to :
5S71-12K532-XB 5S71-12K532-TB 5S71-12K532-UB 5S71-12K532-VB 5S71-12K532-PD
just my thoughts, and hope it helps...
Darren..........
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